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CRIPPLESTORMWATER MANAGEMENT PLAN <br /> " . •' GOLD MINING COMPANY <br /> 2.0 Areas Subject to Effluent Limitation Guidelines <br /> CC&V currently holds a general stormwater discharge permit (Permit No. COR-040000, Certification No. <br /> COR-040049), issued by the Colorado Discharge Permit System (CDPS). In addition, CC&V holds three <br /> individual discharge permits: <br /> • Carlton Tunnel discharge (Permit No. CO-0024562) <br /> • Fourmile Creek Springs discharge (Permit No. CO- 0046540) <br /> • Arequa Gulch discharge (Permit No. CO-0043648) <br /> The permits for Carlton Tunnel and Fourmile Creek Springs are discharge permits which were acquired by <br /> predecessor companies to monitor the water quality of the flow from the Carlton Tunnel and Fourmile Creek <br /> Springs. Stormwater at the Carlton Tunnel is managed using a series of BMPs, culverts, concrete spillways, <br /> and ditches (see Figure 18). Water quality at Fourmile Creek Springs is monitored on a monthly basis. <br /> The permitted discharge location for Arequa Gulch is a sedimentation pond, constructed up-gradient of a <br /> the designated monitoring point for this permit Discharges occurring at this location are not subject to <br /> technology-based effluent limit guidelines (ELGs), as described in the original permit issued December 31, <br /> 2002. The rationale to not include ELGs is summarized below in language from the permit: <br /> "Given the changes in the operation of the Cresson project in the area of the above-described <br /> drainage systems, the policy changes set out in the Modification Rule, and the fact that limitations <br /> based on federal effluent limitation guidelines for Outfall 001A never took effect, the Division is not <br /> including limitations based on federal effluent limitation guidelines in this permit. Storm water <br /> discharges from outfalls in the previous permit (002A, 003A, 004A) and any other similar storm <br /> water outfalls are covered under the general storm water permit re-issued for the Cresson project <br /> on September 21, 2001, and the associated storm water management plan provided to the Division <br /> and certified by CC&V." <br /> Stormwater structures within Arequa Gulch are depicted in Figures 2 and 3. <br />